Adding-machine.



1a' suman-juin: 1.

GRM una 1. E. MESE; ADDING MACHINE. v `AIEILIGATION FILED AUG. 30, 1911.

1,04 ,690. Patented Nov. 19, 1912.

j a SHEETS-SHEET 2. F45) v ,46 I

awww/Coz @XM/Emco@ P. E. MESE. y y ADDING MACHINE. IAPPLICATION FILED A-UG. 30, 1911.

' Patented Npv. 19, 1.912.Y

UNITED sTATEs irTENT clarion.

n.'EERLEY E. REESE, 0F KANSAS CITY, MISSOURI, ASSIGNOR TO WILLIAM C. RENFROW, I

F kKANSAS CITY, MISSOURI.

ADnINe-imcmnn.

Specification of Letters Patent.

Patented nov. 19, 191

Application led AugusitBO, I1911; -iSeral No. 646,892.

To all ywhom, t may concern Be it known that I, PERLEY E. Reese, of Kansas City, in thecounty of Jackson and Statel of Missouri, have invented certain new and useful Improvements in Adding- Maohines; and I do hereby declare the ytollowing to. be a full,- clear, and exact descrip tionof the invention, such as Will enable others skilled in thel art to which it appert-ains to make and use'the same.

. `The primary object of this invention is Ito provide a'n extremely simple and inexpensive adding machine, composed of compara tively few parts and Which Willbe positive in operation.

The invention Will be hereinafter fully set forth land particularly pointed out in the claims. v l

Inthe accompanyingdrawings, Figure l' is a view in perspective. Fig. 2 is a. side elevation-ivith parts in section.' Fig. 3 is a topl plan .view with the cover removed. Fig. 4- is a vertical sectionalv view on line v-i, Fig. 2. Fig. 5 is a iView in perspective of the escapement .mechanism7 parts being broken away and others omitted. Fig. 6 a de- ,tached vView of the hundreds carrying mechanism, the actuating shaft andresetp ting member. 'Fig 7 is a View in side elevation, With parts' broken i away, and others omitted, showing the escapement mechanism inthe positionto which it isvmoved when a key is depressed.

y Referring to the drawings, l indicates a base and 2 a series of key-levers', preferably' nine in number, ulcr'umed on the base, each lever being oi L-form, its short arm 3 being extended 'rertically to form a stop, and at the front end each lever carries a number The upper ends of the vertical arms 3 are all in the same horizontal, plane vand When shift-y ed coperate with a differential gear 5 forming ,part of an escapement mechanism. The

levers 2 are maintained in proper relative positions by a comb plate 7, and each lever is held in its normal position by a spring The escapemcnt mechanisn'i' is pivotally. mounted on a. shait 9, and comprises a pairA of standards l0, which 'support a shaft 1 1, on which the di'llierential gear is mounted.

This ditl'erential gear comprises tivo spacedapart dis, lf2, lQ, which are mounted on shaft il.- These kdisks are connected by a We 1 one edge oi which 1s toi-.med With Le). l

drawings, numbering oneI hundred Vmesh with l the di'erential gea-ring. ypaivl is so held in engagement "i'vith 'the gear of the numerahnf'heel. The disk 12/is provided in its 4periphery With'a segmental series of' gea-r teethl 20, sullicient in number-to allow' the differential gear to be revolved to cause the outermost stop 16 to engage with the vertical arm of its respective keylever.v Projecting from the disk lf2 is a pin 2l adapted -to Contact With `anarm Q2 on shaft 9 When-the parts are. in; normal position.

The shaft l1 has at one end an arm 94,' to Whichis fastened a- 'spring .25, tor returning the differential. gear to its normal position, upon reaching which the pin 2l engages a-rm'QQ, y

'2G is a-fhorisontally-disposed power shaft to which is lined a vertically-disposed gear Wheel 27, the teeth thereof, as shovvnin the y The gear Wheel is in alinement with the disk lf2 ,of the differential gear, and gear teeth QG will mesh tliereivith'to limit the extent ot rotation'ot' the vertically-disposed Wheel QT when a key lever is depressed.

Loosely inminted on the sha'l't ll is a paWl 29, which engages gear wheel 97 when a key is depressed to prevent backward rotation. This patvl is normally drawn toward the gear wheel by av spring 30, and is limited in its movements by tivo .pins 3l, projecting romthe inside of one of the standards l0,

isv located.; On shaft 9 is loosel')7 mounted the hub 33 `of a second paivl 'which cngages the gear `Wheel 27 to hold' the latter against forward Vmovement when 'outmof r ns From the hub ,33 er wheel by spring 3 tends a verticali)` l`sposed arm 85 which lies in the plane of movement ofi a cross-bar 36 yand between which an extension ot the pawl carried' bythe standards 10 of the escape-l lnent so that as the latter ismoved forward to allow-the dierentia'l gear to mesh with wheel' 27 f the pawl 3 4 'will be Vdisengaged the number ofteeth on the gear wheel," one row, 41 repres`enting units and the other,

42, tens. The vnumerals of the units row! are arrangedin ten Agrou'psra'nging each from 'O to 9, while'the numerals oit theV tensfrow are arranged' in groupso'ten.

'prisinga fixed casing 46. "and aspring 47 inclosed therein one end of the spring being fastened to s haft126', and thel other end secured to-the'ca'si'ngx- The motor isintend-l .fedgt-o drive the power shaft-"coimter'fclockJ :isowheel according to the particular {key-lever wise to progressively advance the' numeral depressed. The power shaft carries 'a lnob 4 9 by which it may be turned to rewind the spring. Also on .this-shaft 26V is a WormV 50,'. the thread of which' atene. end has a' stop 51, while at the opposite end of the worm is a second stop 52. A-horizontally disposed arm 54 'pivoted at' one endcarries 'at its f reeend a depending pin-'5 5 which tending lug 56 which-upon being engaged by stop 52 limits 'the winding-ofthe motor.

V ling. saidlwlleel y againstv iorwardl moYem'ent-.ev

A1165 .FI- Pvt'to 'the ram'supportmg the# distance the gearjwheel'may revolve. When pressurefon'the vkey-lever is removed, the 12o ment being (limite 'by'fa'stop Orrl the .spring'39 immediately returns theV escapentfworks in thezworm', and-also a"lateifallye X-A fThe movement-of tHe'jsh'aft inthe opposite pkeriphery oi whichis inline arm :66 is fpivotedfanL-shaped pawl 68, the'.

.'vertical' portion fof which vformed withf-af `tooth .to engage .the 41 'isrtlhet.wh'eel61' to 'pe-"-v` v T jupper" ed fe 'of' 's'aid-yerticalf ortion-is. slightly o setto eitend undert e' r1m`40 ofthe numeral wheel.- Thesubstantially 'horizontal 4arm ofjthe pawl 6 8 is iarranged atte gaat. of the @we s hgiafpackjpawi able cover which-is provided with an opendirection of the arrow in Fig.` lxto wind the tozero,. 'thefstop-52 and iange' prevent- ,ing overwindng of the motor and turning yof the ge'arwheel-beyond the desired point.v During this operation the pawl 2 9 is 0ut or vnumerals to be added are depressed,"for in The 10 movcment'with thearm 35 and thereby dise'r'y' of thefgear-- wheel v27...'f`n`g "nig t. vLofthe1 motor. The Adiffercntia l-gear is also 115 revolved L unti1 the `respective thereof leiliggfgages the'.'vertical ann-of the-depressed pivoted to the frame, and .held in engagement with the ratchet wheel 6l by a spring l72. A carrril on the inner surface of the rim 4 0 is designed to coperate with the offset end ofthe L-shaped pa'wl 68 once in each revolution of the gear wheel 27 so as to advance the vwheel 60 one stepto 'representthe figures in a hundreds column.

` The'` mechanism is linclosed' within a suiti'ng'73 -through whichthe numerals-may. be viewed.

In operation, the knob 4'9 is' turned inthe .spring motor and to return the gear wheel engagement and the pawl 34 inengagement with the gear wheel, the pawl tallowing" l-thewheel to readily ride over it in; unwind.-

ingthe'spring., The 'device being ready for operation, the key ,leve rs.representing the stance, levers 7, '8, 9,4 and''and the total Will, through the mechanism described, show opposite lthe opening' 73.- If amounts inyolving units and tens-"- are to be add- .ed,.for instance, 10 .and ,12, key level-shear! `95 ing characters 9f-1, `and 9-73, or other combinations requaling. the respective amounts, will be successiveiy depressed,` thereby showingj the total o' posite the opening in the case. Any two or more-keys representing 100 the total cfa number, iucludinga unit and .a tem v11i-'ust' be operated to. add the lvarious amounts.'

When' a 'keyleyer is operated, the vertical l arm thereof contacts with thiecrossbar 36 105 and rocks the *fescapement lmechanism, for- Wa on Shaft 9, throwing the 'diierential gear into meshwith .the 'gear wheell This Q alsofcause's the 'pawl '295130 engage with the l gear. wheel t'o preyent .rebounding thereof. 110

:keyJeVerLV This, ofcourse, determines the ment tonormal position."- While this' is place, and' before the gears .20'and 27 are out of mesh, the'spring 30 moves the .,pawl 34 into engagement with the gear 125 wheel toholdthe latterin its new position.

This latter n iovementv is rpractically simulbrought into engagement 4and vthe diteren- 13o lever a s :in

,rim topbri'ngcfthe respective. numerals oppo-V site. the Opening: 7 1

Wlienft-he amount reaches .99 the' cam 7110iy theigear. Wheely contactswith the. ott- :presses-theiarm GGtoi-fset. the tooth to engage 'onefofthe' kteethofthe iatchet 'wheel 61, the paivl:170holdingthe ratchet against back-A ward movement. .Upon the next operation of a key lever, cam 71 -frees the endof pawl 68 and the spring'GT draws the arm 66 and the kpaivl 468.-upwardly advancing the hundreds` Wheelone' step, thus bringing` a numeral thereof opposite the opening 73 and in aliiienient with. the numerals indicated on rim, 40;r `Duringithe adding operation the worin 50./is revolvedand arm 54 is moved thereby` unt-il stopl engages'lug 55 which limits. Lthe rotation. of the operating shaft. lVhen this occurs the motor must be re- Wound; In the `rewinding, the rear edge of the cam 7l contacts With thel upper end of pavvl G81andturn`s ition its pivot out of engageme'ntrivitlrthe rratchet G1, causing its lower end .to strike lthe lower end of paivl to diseiigage the latter from. ythe ratchet 61,-v which, together xvith `wheel 60, will then returngto normal position under the iniiuence (if-spring 63 which connectedto.

arm GQ carriedchy Wheel 60.

A machine` constructed as described is limited to adding comparatively small sums,

but it is obvious thatby e'nlargingvor re-y arranging tlie parts larger igures may be added.

I claim as my linvention:

1. An adding machine comprising, in

. coml'iination, a gear-wheel provided with consecutively-arranged numerals, a motor, escapement mechanism comprising a gearpinion and a series ot' diiierential stops carried by said gear-pinion, and a series of keylevers having extensionsformoving the escapementfmechanism to'alloiv the gear-pinion to mesh with said gear-Wheel, said extensions being designed to cooperate with said differential stops.

Q. An adding machine comprising, in

combination, a gear-Wheel provided with consecutively-arranged numerals, a motor,

holding means -for'said gear-Wheel,escapement mechanism comprising a gear--pi1iion-- and a series of differential stops carried by said gear-pinion, a seriesof'ltevdevers having extensions tor moving the esifapcment mechanism nto allow the gear-pinion to mesh withI said gear-Wheel, said extensions being designed. to cooperate: with said dierential stops, and means actuated bythe movei'iieiit ,n of said; stop-mechanism-for releasingsaid',y

holdingmeans ,c i

3. i n' adding. machine combination, agear Wheel provided withV gear-pinion designed to. mesh With saidy gear-Wheel and normally out of engagement` therewith, a series of diferentialstops car-V comprising, in l i `consecutively arrangedinuincrals, a motor, a f

ried by said gear-pinion, agmovable support gear-'p'iniondesigned to linesh'with said gear- Wheel, a shaft for said gear-pinion, a spring for returning the gear-pinion to its normal position, a movable frame forming bearings for said shaft, said gear-pinion having a series of diii'erential stops, a series of keylevers having arms designed to engage said `frame, said arms cooperating with the stops of the gear pinion,a'nd two spring-held revtaining p'aivls for alternately engaging said :gear-Wheel. a

5. Anl` r'adding machine comprising, in

combinatiornfa geanwheel provided with consecutively arranged numerals, a motor, a

vertically disposedgear pinion designed to mesh. With said gear Wheel, a series of diiliei-, ential stops carried by said gear-pinion, a

movable frame'having tivo corresponding n. spaced-apart members forming bearings for said shaft,"a cross bar connecting said memn bers,` a. series of 'key-levers' having arms ydesigned to engage said cross bar to move said frame, said arms coperating with said differential stops, and two spring-held retaining pawls lfor alternately engaging said gear-Wheel. 1

6. An adding machine comprising, in combination, a gear-wheel provided with consecutively arranged numerals, a motor, two disks connectedA together and having stepped flanges formingdifferential stops, one of said disks having segmental teeth forming a gear-pinion for meshing with said gear\vheel, a spring acting on said shaft to return the disks to their normal positions, a 120 movable frame supporting said shaft, and a series of key-levers havingvarms for engaging said frame for moving said gear-pinion into mesh -with the gear-wheel, the ends of said arms forming stops for coi'ipcrating with said stepped iiz'inges.y

7. An adding machine comprising. in combination, a geari\l1eel provided with consecutively arranged nume als. a motor, a gear-pinion designed to mesh with said gear- 5 thelattel' a Spring-50mg' on; Said" or engaging said gearwheejl,

Wheel? aof differential 'gearfpinionga movable me supsaid gear-pinion. and stops, an arm Spring-held paWl mounted concengxcallyto said-frame for also engagingsaid wheeL-jand an arm' carried by?Y said last mentioned pawl designed to vbe engaged z gadgframe to free such' pawl from'the gear-1 Wheel Whenthe gear-pinion is `moved into withthe gear wheel,

"l 48.? adding machine comprising, in combin'ation, a verticallydi'sposed 'gear Wheel' provided with 'consecutively arranged 'nul lling V 01; said shaft .to turn the 'wheel inone 25;' directionfarworm on saidshaft havinga- A stop at one end; a pivoted arm having a pin fitti-ng in said Worm and a 'laterally-extendg. ug forlen'gaging said to limit the {turning-ofthe shaftjn one directiomand ons'ai'd shaft for Winding I .the motor." l. Sgr adding machine comprising', in' combination, a verticallydisposed -gear wheel' 3 5: said shaftto turn-'the wheel nfon'e *directioma vWorm on' said shaft having stops attheoppositerends thereof, a pivoted' arm having! agpin fitting inzsaid Worm and de- 40 said'arm' also having'a l'aterallylxilgdin'g lgorilengaging thestop at the other end of i vcarried* lthcworm E ing witnesses. Y

ingthe motor.L

1o. An addmg arrangedJ-numerals,' ai second numeral carry- '-ing'whel* mounted Aadj acentl to the rst men'- tionedwheel, a spring acting on'saidsecond Wheel to 'move it'- onefdirection, a` ratchet carried-bylsaidsecond Wheel,l a pa'wl engag- Q and means on saidshaft for Windi maehinefhavlg s mais j. wheel provided with a series-of consecutively ing said raichet,a pivoted support for said pawl, a spring actmg'on saidsup'port, and apcamonproj'ection carried 'byf said,v main vwheel forengagin'g. said pawl" to depress its support,' 'saidhsprn Whenthefpawl is freed Y'of s'aidcam'or pro ection,*'caus1ng the p aWl through' itsA action on 'the ratchet :to turn said second wheel.

11. A11. adding machine 'havingfa aan, wheel provided with a series-of'consecutivelyI arranged` numerals, a second nil-meral` carryl'.

:ing wheel mounted adjacent tothe first men-1il tioned wheel, aspring actin'g'onsad second cayried-byl'sa'id second wheel; a .pawl engag'' jing said ratchet, a-pivoted support for said pawl, a spring a'ctngon said' support,a cam and a second pavvl enga `ng said ratchet.

projection for disenga'ging .the 'second pavvl from the ratchet Wheel Whenlthe first menport. y

l In testimony 'whereof,' I' have. signed' this specication'in the presence of two s ubsvcrib'fl` `wheel tofmovcfit in one direction, .a 'ratchet-'65 Of'proj ectionl carried bysaid main Whe e1 for. 'n' engaging said pawltodepress its Supportb Wh'ee1, the first mentione' pawl', having aff 

